Jaw crusher



J. E. KENNEDY JAW CRUSHER Filed Feb. 20, 1928 $51 2 3 Elbtomw porting frame.

Patented July '2, 19

JOSEPH n. KENNEDY, on NEW yonx, N. Y.

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Application filed Fem-m 20, 1928. Serial no; 255,819.

This invention relates to jaw crushers for crushing rock, ore and the like and particularly to means for mounting the movable or swinging jaw member of the crusher to a sup- In crushers of this character the swinging jaw member is 'of a hollow reinforced frame structure arranged on one face with a crushing jaw facing a fixed jaw member. The swinging crushing member is pivotally mounted in the frame of the crusher, as disclosed by my prior Letters Patent #1,416,753, dated February 17, 1923, by pivot pins or studs mounted in recesses in the frame to extend from opposite sides and adjacent the top of the crushing member. The pivot studs are held against rotation in said recesses by being forcibly engaged in the recesses keyed to the frame to rotatably support the frame in bearings carried by the crusher. Due to the weight of the jaw and the great stresses and strains exerted thereon in operation of crushing in spite of the keying of the frame to the pivot studs they become loose allowing movement of the crushing member and pivot studs not only resulting in the inefiicient operation of the crushing memberbut invariably resulting in the fracturing of the crushing member should the play between a pivot and the frame not be taken up promptly. This requires the removal of the crushing member from the crusher frame, which is a tedious job.

It is the principal object of the invention to overcome these disadvantages by constructing the pivot supports integral with the jaw frame and arranged in such a manner as to increase the strength thereof.

Other objects and advantages will hereinafter appear.

In the drawing accompanying and forming a part of this application, Figure 1 is a cross sectional view of the crushing member showing the same mounted in a crusher frame, only so much of the frame being shown as is essential to an understanding of the invention; and

Figure 2 is a cross sectional view of the crusher taken on line 2--2 of Figure 1 looking in the direction of the arrows, showing my improved crushing member, partly in sec tion mounted therein.

Like references designate like parts throughout the specification and. drawing.

In carrying out the invention there is provided a supporting frame 3, only part of which is shown, as it is similar to that shown in the aforementioned Letters .Patenhwith one end member thereof inclined and adapted to releasably carry a platej aw 4 of wear reslsting material formingthe fixed jaw of the crusher. In opposedrelation to said fixed jaw, a crushing member is swinging or pivotally mounted in the side members of the supporting frame adapted to be oscillated bya pitman 5 eccentrically mounted on a drive shaft 6 driven from a suitable source of power by a belt (not shown) passing around a fly wheel 7 fixed to the shaft 6 and flexibly connected to the crushing member by means of a toggle 8 in the form of a plate pivotally mounted at opposite circular shaped edges thereof, as at 9, in bearings carried by the pitman and crushing member. The toggle is maintained in engagement in the bearings by means of rods 10 pivotally connected at one end thereof to ears 11 extending from the bottom of the crushing member and slidably mounted at the opposite end in the other end member of the frame (not shown) arranged with a spring coiled about the rods at the latter end thereof, to compensate for the oscillation of the swinging crushing member.

The crushing member embodies a jaw carrying frame 12 of a hollow reinforced steel cast frame having one surface thereof recessed for the releasable engagement of a plate jaw 13 of wear resisting material arranged at the bottom edge with a recess of V-shape to engage a correspondingly V- shaped projection of the frame 12, as at 14, and the upper edge of the jaw is arranged with a similar V recess engaging a V projection of a locking strip 15 having horizontally alined perforations to carry bolts 16 adapted to pass through perforations in the frame 12 and secured thereto by nuts threaded on the ends of the bolts projecting beyond the rear of the jaw frame. The frame 12 is swingingly mounted in the frame 3 by laterally projecting trunnions 17, 18, cast integrally with the frame and extending coaxially of a tubular portion 19 extending transversely of one end of the frame with the bore varying in diameter, as at 20, to reduce the cost of manufacture and the weight of the casting but providing a greater amount of material by having the bore of smaller diameter at the juncture of the trunnions and the body portion of the frame to serve as a reinforcement and prevent breakage. The trunnions are machined to rotate in hearings in the frame 3 formed by shaping a portion of the frame claim;

into a seat 21 and providing caps 22 for superposed engagement relative to the seats, comprising an arch portion and lateral extending flanges which are bolted to the frame. 7

The seats and caps are lined with a bearing material 23. 'The tubular portion of the frame 12 is arranged with spaced eyes cast integral therewith for the engagement of tackle means to facilitate the handling of the frame 12 to mount the same in the bearings 21 of the supporting frame 3.

' Having thus described my invention I 2. A crushing member for jaw crushers, comprising a rectangular aw carrying frame arranged with integral trunnions extended from opposite sides of the frame at a marginal portion thereof to pivotally mount the frame in the crusher frame, and said jaw carrying frame having one face recessed and arranged for mounting a crushing jaw therein. v

3. A crushing member for jaw crushers as claimed in claim 2, wherein the trunnions comprise the ends of a tubular portion at a marginal portion of the frame extended from opposite sides of the frame said extended ends of the tubular portion being of less diameter than the intermediate portion to reinforce the same.

Signed at the city of New York, in the county of New York and State of New York this 2nd day of February 1928.

JOSEPH E. KENNEDY.

and the bore in 1 

